change first sentence in readme

README.md

 # Pixel [![GoDoc](https://godoc.org/github.com/faiface/pixel?status.svg)](https://godoc.org/github.com/faiface/pixel) [![Go Report Card](https://goreportcard.com/badge/github.com/faiface/pixel)](https://goreportcard.com/report/github.com/faiface/pixel) [![Join the chat at https://gitter.im/pixellib/Lobby](https://badges.gitter.im/pixellib/Lobby.svg)](https://gitter.im/pixellib/Lobby?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 
-A 2D game library that doesn't get in your way. Focus on ease of use, extensibility and performance.
-Take a look into the [features](#features) to see what it can do.
+A hand-crafted 2D game library in Go. Take a look into the [features](#features) to see what it can
+do.
 
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 go get github.com/faiface/pixel